NCERT Class 8 Mathematics Solutions: Chapter 11 – Mensuration Exercise 11.2 Part 8 (For CBSE, ICSE, IAS, NET, NRA 2022)

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Formula of Area for Prism Bases

1. Diagram of the adjacent picture frame has outer dimensions and inner dimensions . Find the area of each section of the frame, if the width of each section is same.

Given Frame in Figure

Answer:

Two of given figures (I) and (II) are similar in dimensions.

And also figures (III) and (IV) are similar in dimensions.

Area of figure (I) = Area of trapezium

Also,

Area of figure (ii)

Now,

Area of figure (III) = Area of trapezium

Also,

Area of figure (iv)